fix(ci): make scripts importable under plain pytest and add httpx to runtime deps

- pytest pythonpath=["."] so 'from scripts import ...' resolves in CI (plain pytest)
- httpx moved to main deps: scripts/dump.py (TestClient) runs under 'pip install -e .'
  in the refresh-data and deploy-pages workflows

Author: Seungpyo1007

pyproject.toml

@@ -14,14 +14,14 @@ dependencies = [
     "pydantic>=2.9",
     "pydantic-settings>=2.5",
     "scalar-fastapi>=1.0.3",
+    "httpx>=0.27",   # TestClient — used by scripts/dump.py (static dump build step)
 ]
 
 [project.optional-dependencies]
 dev = [
     "pytest>=8.3",
     "pytest-cov>=5.0",
     "pytest-asyncio>=0.24",
-    "httpx>=0.27",
     "ruff>=0.6",
     "mypy>=1.11",
 ]
@@ -54,6 +54,7 @@ ignore_missing_imports = true
 testpaths = ["tests"]
 addopts = "-q"
 asyncio_mode = "auto"
+pythonpath = ["."]   # make top-level `scripts` importable under plain `pytest` (CI)
 
 [tool.coverage.run]
 source = ["app"]